ISOLATION, IDENTIFICATION AND PARTIAL PURIFICATION OF DIHYDROFOLATE SYNTHETASE FROM HYPOTYL STEMS CALLUS OF LETTUSE PLANT ( Lactuca sativa L. ). Mesopotamia Journal of Agriculture, [S. l.], v. 36, n. 4, p. 162–169, 2008. DOI: 10.33899/magrj.2008.27334. Disponível em: https://magrj.uomosul.edu.iq/index.php/magrj/article/view/57703. Acesso em: 30 sep. 2026.